Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.Arrays;
import java.util.List;
import java.util.Optional;

public class Main {
    public static void main(String[] args) {
        List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);
        Optional<Integer> o = numbers.stream().findFirst();
        if (o.isPresent()) {
            System.out.println(o.get());
        } else {
            System.out.println("no value");
        }

    }
}